At his trial, Hitler gained enormous publicity by denouncing the Weimar Republic. He used his brief prison term to dictate his book Mein Kampf (My Struggle), where he laid out his basic ideas on “racial purification” and territorial expansion that would define National Socialism.

In Mein Kampf, Hitler claimed that Germans were a “master race” that needed to defend its “pure blood” from groups he labeled “racial degenerates,” including Jews, Slavs, and others. The German race was destined to triumph and grow, and, according to Hitler, it needed Lebensraum (living space). This space could be found to Germany’s east, which Hitler claimed was inhabited by the “subhuman” Slavs and Jews. The future dictator outlined a sweeping vision of war and conquest in which the German master race would colonize east and central Europe and ultimately replace the “subhumans” living there. He championed the idea of the leader-dictator, or Führer (FYOUR-uhr), whose unlimited power would embody the people’s will and lead the German nation to victory. These ideas — a deadly combination of race and space — would ultimately propel the world into the Second World War.

In the years of relative prosperity and stability between 1924 and 1929, Hitler built up the Nazi Party. From the failed beer hall revolt, he had concluded that he had to come to power through electoral competition rather than armed rebellion. To appeal to middle-class voters, Hitler de-emphasized the anticapitalist elements of National Socialism and vowed to fight communism. The Nazis still remained a small splinter group in 1928, when they received only 2.6 percent of the vote in the general elections and only twelve seats in the Reichstag, the German parliament. There the Nazi deputies pursued the legal strategy of using democracy to destroy democracy.

The Great Depression of 1929 brought the ascent of National Socialism. Now Hitler promised German voters economic as well as political salvation. His appeals for “national rebirth” appealed to a broad spectrum of voters, including middle-and lower-class groups — small business owners, officeworkers, artisans, peasants, and skilled workers. Seized by panic as bankruptcies increased, unemployment soared, and the Communists made dramatic election gains, voters deserted conservative and moderate parties for the Nazis. In the election of 1930 the Nazis won 6.5 million votes and 107 seats, and in July 1932 they gained 14.5 million votes — 38 percent of the total. They were now the largest party in the Reichstag.

The breakdown of democratic government helped the Nazis seize power. Chancellor Heinrich Brüning (BROU-nihng) tried to overcome the economic crisis by cutting back government spending and ruthlessly forcing down prices and wages. His conservative policies intensified Germany’s economic collapse and convinced many voters that the country’s republican leaders were stupid and corrupt, adding to Hitler’s appeal.

Division on the left also contributed to Nazi success. Even though the two left-wing parties together outnumbered the Nazis in the Reichstag, the Communists refused to cooperate with the Social Democrats. Failing to resolve their differences, these parties could not mount an effective opposition to the Nazi takeover.

Finally, Hitler excelled in the dirty backroom politics of the decaying Weimar Republic. In 1932 Hitler cleverly gained the support of the conservative politicians in power, who thought they could use Hitler for their own advantage, to resolve the political crisis, but also to clamp down on leftists. They accepted Hitler’s demand to be appointed chancellor in a coalition government, reasoning that he could be used and controlled. On January 30, 1933, Adolf Hitler, leader of the largest party in Germany, was appointed chancellor by President Hindenburg.